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Submerged arc welding

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Submerged arc welding (SAW) is an arc welding process in which fusion is produced by heating with an electric arc or arcs between a bare metal electrode or electrodes and the work. Pressure is not used. Filler metal is obtained from the electrode, and sometimes from a supplementary welding rod.[1] Shielding is supplied by a granular, fusible material usually brought to the work from a flux hopper.[2]

Wire

SAW is usually conducted with a single wire with AC or DC. Variants include:

  • Twin wire
  • Multiple wire (tandem or triple)
  • Single wire with hot or cold wire addition
  • Metal powder addition
  • Tubular wire

Flux

The primary types of flux for SAW are:

  • Bonded fluxes
  • Fused fluxes[3]

References

  1. http://www.weldguru.com/welding-terminology.html
  2. http://www.hobartwelders.com/elearning/glossary.php
  3. http://www.twi.co.uk/content/jk5.html
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